A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 5985-00-491-2299
NSN 5965-01-176-9052
NSN 5990-01-463-5400
NSN 6130-01-464-4174
NSN 5930-01-643-7271
NSN 5925-01-589-1017
NSN 6220-01-651-4946
NSN 5895-01-230-5391
NSN 5915-01-294-3140
NSN 5996-00-536-4671
NSN 5895-01-052-4877
NSN 6130-00-519-6192